lttng-sessiond/ust-app.h

   1 /*
   2  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; only version 2
   7  * of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #ifndef _LTT_UST_APP_H
  20 #define _LTT_UST_APP_H
  21
  22 #include <stdint.h>
  23 #include <urcu/list.h>
  24
  25 #include "trace-ust.h"
  26
  27 #define UST_APP_EVENT_LIST_SIZE 32
  28
  29 extern int ust_consumerd64_fd, ust_consumerd32_fd;
  30
  31 /*
  32  * Application registration data structure.
  33  */
  34 struct ust_register_msg {
  35         uint32_t major;
  36         uint32_t minor;
  37         pid_t pid;
  38         pid_t ppid;
  39         uid_t uid;
  40         gid_t gid;
  41         uint32_t bits_per_long;
  42         char name[16];
  43 };
  44
  45 /*
  46  * Global applications HT used by the session daemon.
  47  */
  48 struct cds_lfht *ust_app_ht;
  49
  50 struct cds_lfht *ust_app_sock_key_map;
  51
  52 struct ust_app_key {
  53         pid_t pid;
  54         int sock;
  55         struct cds_lfht_node node;
  56 };
  57
  58 struct ust_app_ctx {
  59         int handle;
  60         struct lttng_ust_context ctx;
  61         struct lttng_ust_object_data *obj;
  62         struct cds_lfht_node node;
  63 };
  64
  65 struct ust_app_event {
  66         int enabled;
  67         int handle;
  68         struct lttng_ust_object_data *obj;
  69         struct lttng_ust_event attr;
  70         char name[LTTNG_UST_SYM_NAME_LEN];
  71         struct cds_lfht *ctx;
  72         struct cds_lfht_node node;
  73 };
  74
  75 struct ust_app_channel {
  76         int enabled;
  77         int handle;
  78         char name[LTTNG_UST_SYM_NAME_LEN];
  79         struct lttng_ust_channel attr;
  80         struct lttng_ust_object_data *obj;
  81         struct ltt_ust_stream_list streams;
  82         struct cds_lfht *ctx;
  83         struct cds_lfht *events;
  84         struct cds_lfht_node node;
  85 };
  86
  87 struct ust_app_session {
  88         int enabled;
  89         /* started: has the session been in started state at any time ? */
  90         int started;  /* allows detection of start vs restart. */
  91         int handle;   /* Used has unique identifier */
  92         unsigned int uid;
  93         struct ltt_ust_metadata *metadata;
  94         struct cds_lfht *channels; /* Registered channels */
  95         struct cds_lfht_node node;
  96         char path[PATH_MAX];
  97 };
  98
  99 /*
 100  * Registered traceable applications. Libust registers to the session daemon
 101  * and a linked list is kept of all running traceable app.
 102  */
 103 struct ust_app {
 104         pid_t ppid;
 105         uid_t uid;           /* User ID that owns the apps */
 106         gid_t gid;           /* Group ID that owns the apps */
 107         int bits_per_long;
 108         uint32_t v_major;    /* Verion major number */
 109         uint32_t v_minor;    /* Verion minor number */
 110         char name[17];       /* Process name (short) */
 111         struct cds_lfht *sessions;
 112         struct cds_lfht_node node;
 113         struct ust_app_key key;
 114 };
 115
 116 #ifdef HAVE_LIBLTTNG_UST_CTL
 117
 118 int ust_app_register(struct ust_register_msg *msg, int sock);
 119 void ust_app_unregister(int sock);
 120 unsigned long ust_app_list_count(void);
 121 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
 122 int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
 123 int ust_app_start_trace_all(struct ltt_ust_session *usess);
 124 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
 125 int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app);
 126 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
 127 int ust_app_list_events(struct lttng_event **events);
 128 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
 129                 struct ltt_ust_channel *uchan);
 130 int ust_app_create_event_glb(struct ltt_ust_session *usess,
 131                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 132 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
 133                 struct ltt_ust_channel *uchan);
 134 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
 135                 struct ltt_ust_channel *uchan);
 136 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
 137                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 138 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
 139                 struct ltt_ust_channel *uchan);
 140 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
 141                 struct ltt_ust_channel *uchan);
 142 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
 143                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 144 int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
 145                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 146                 struct ltt_ust_context *uctx);
 147 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
 148                 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
 149 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
 150
 151 void ust_app_clean_list(void);
 152 void ust_app_ht_alloc(void);
 153 struct cds_lfht *ust_app_get_ht(void);
 154 struct ust_app *ust_app_find_by_pid(pid_t pid);
 155
 156 #else /* HAVE_LIBLTTNG_UST_CTL */
 157
 158 static inline
 159 int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
 160 {
 161         return 0;
 162 }
 163 static inline
 164 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
 165 {
 166         return 0;
 167 }
 168 static inline
 169 int ust_app_start_trace_all(struct ltt_ust_session *usess)
 170 {
 171         return 0;
 172 }
 173 static inline
 174 int ust_app_stop_trace_all(struct ltt_ust_session *usess)
 175 {
 176         return 0;
 177 }
 178 static inline
 179 int ust_app_list_events(struct lttng_event **events)
 180 {
 181         return 0;
 182 }
 183 static inline
 184 int ust_app_register(struct ust_register_msg *msg, int sock)
 185 {
 186         return -ENOSYS;
 187 }
 188 static inline
 189 void ust_app_unregister(int sock)
 190 {
 191 }
 192 static inline
 193 unsigned int ust_app_list_count(void)
 194 {
 195         return 0;
 196 }
 197 static inline
 198 void ust_app_lock_list(void)
 199 {
 200 }
 201 static inline
 202 void ust_app_unlock_list(void)
 203 {
 204 }
 205 static inline
 206 void ust_app_clean_list(void)
 207 {
 208 }
 209 static inline
 210 struct ust_app_list *ust_app_get_list(void)
 211 {
 212         return NULL;
 213 }
 214 static inline
 215 struct ust_app *ust_app_get_by_pid(pid_t pid)
 216 {
 217         return NULL;
 218 }
 219 static inline
 220 struct cds_lfht *ust_app_get_ht(void)
 221 {
 222         return NULL;
 223 }
 224 static inline
 225 void ust_app_ht_alloc(void)
 226 {}
 227 static inline
 228 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
 229 {}
 230 static inline
 231 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
 232                 struct ltt_ust_channel *uchan)
 233 {
 234         return 0;
 235 }
 236 static inline
 237 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
 238                 struct ltt_ust_channel *uchan)
 239 {
 240         return 0;
 241 }
 242 static inline
 243 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
 244                 struct ltt_ust_channel *uchan)
 245 {
 246         return 0;
 247 }
 248 static inline
 249 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
 250                 struct ltt_ust_channel *uchan)
 251 {
 252         return 0;
 253 }
 254 static inline
 255 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
 256                 struct ltt_ust_channel *uchan)
 257 {
 258         return 0;
 259 }
 260 static inline
 261 int ust_app_create_event_glb(struct ltt_ust_session *usess,
 262                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 263 {
 264         return 0;
 265 }
 266 static inline
 267 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
 268                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 269 {
 270         return 0;
 271 }
 272 static inline
 273 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
 274                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 275 {
 276         return 0;
 277 }
 278 static inline
 279 int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
 280                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 281                 struct ltt_ust_context *uctx)
 282 {
 283         return 0;
 284 }
 285 static inline
 286 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
 287                 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
 288 {
 289         return 0;
 290 }
 291
 292 #endif /* HAVE_LIBLTTNG_UST_CTL */
 293
 294 #endif /* _LTT_UST_APP_H */